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This is a backport of OpenJFX 8 to run on Java 7.
The newest version!
/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javafx.scene.control;
import javafx.css.CssMetaData;
import com.sun.javafx.scene.control.skin.LabelSkin;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.ObjectPropertyBase;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.css.StyleableProperty;
import javafx.scene.Node;
/**
* Label is a non-editable text control. A Label is useful for displaying
* text that is required to fit within a specific space, and thus may need
* to use an ellipsis or truncation to size the string to fit. Labels also are
* useful in that they can have mnemonics which, if used, will send focus to
* the Control listed as the target of the labelFor property.
*
* Label sets focusTraversable to false.
*
*
* Example:
*
Label label = new Label("a label");
* @since JavaFX 2.0
*/
public class Label extends Labeled {
/***************************************************************************
* *
* Constructors *
* *
**************************************************************************/
/**
* Creates an empty label
*/
public Label() {
initialize();
}
/**
* Creates Label with supplied text.
* @param text null text is treated as the empty string
*/
public Label(String text) {
super(text);
initialize();
}
/**
* Creates a Label with the supplied text and graphic.
* @param text null text is treated as the empty string
* @param graphic a null graphic is acceptable
*/
public Label(String text, Node graphic) {
super(text, graphic);
initialize();
}
private void initialize() {
getStyleClass().setAll("label");
// Labels are not focus traversable, unlike most other UI Controls.
// focusTraversable is styleable through css. Calling setFocusTraversable
// makes it look to css like the user set the value and css will not
// override. Initializing focusTraversable by calling set on the
// CssMetaData ensures that css will be able to override the value.
((StyleableProperty)focusTraversableProperty()).applyStyle(null, Boolean.FALSE);
}
/***************************************************************************
* *
* Properties *
* *
**************************************************************************/
private ChangeListener mnemonicStateListener = new ChangeListener() {
@Override
public void changed(ObservableValue observable, Boolean oldValue, Boolean newValue) {
Label.this.impl_showMnemonicsProperty().setValue(newValue);
}
};
/**
* A Label can act as a label for a different Control or
* Node. This is used for Mnemonics and Accelerator parsing.
* This allows setting of the target Node.
*/
public ObjectProperty labelForProperty() {
if (labelFor == null) {
labelFor = new ObjectPropertyBase() {
Node oldValue = null;
@Override protected void invalidated() {
if (oldValue != null) {
oldValue.impl_showMnemonicsProperty().removeListener(mnemonicStateListener);
}
final Node node = get();
if (node != null) {
node.impl_showMnemonicsProperty().addListener(mnemonicStateListener);
impl_setShowMnemonics(node.impl_isShowMnemonics());
} else {
impl_setShowMnemonics(false);
}
oldValue = node;
}
@Override public Object getBean() {
return Label.this;
}
@Override public String getName() {
return "labelFor";
}
};
}
return labelFor;
}
private ObjectProperty labelFor;
public final void setLabelFor(Node value) { labelForProperty().setValue(value); }
public final Node getLabelFor() { return labelFor == null ? null : labelFor.getValue(); }
/***************************************************************************
* *
* Methods *
* *
**************************************************************************/
/** {@inheritDoc} */
@Override protected Skin createDefaultSkin() {
return new LabelSkin(this);
}
/***************************************************************************
* *
* CSS Support *
* *
**************************************************************************/
/**
* Most Controls return true for focusTraversable, so Control overrides
* this method to return true, but Label returns false for
* focusTraversable's initial value; hence the override of the override.
* This method is called from CSS code to get the correct initial value.
* @treatAsPrivate implementation detail
*/
@Deprecated @Override
protected /*do not make final*/ Boolean impl_cssGetFocusTraversableInitialValue() {
return Boolean.FALSE;
}
}